Sand-blast machine



- w. JORGENSEN SAND BLAST MACHINE Filed July 14. 1923 2 Sheets-Sheet 1 INVENTOR 1,504,048 'W. JORGENSEN SAND BLA'ST Macnma Filed July 14. 192:5 zsheezs-shez a INVENTOR WITNESSES ATTORNEY Patented Aug. 5, 1924.

teats WESLEY JORGENSEN, OF HAGERSTOWN, MARYLAND.

' SAND-BLAST MACHINE.

Application filed July 14, 1923. Serial No. 651,682.

To all whom it may concern:

-Be it known that I, WESLEY J ORGENSEN, a citizen of the United States, residing at Hagerstown, in the county of Washington and State of Maryland, have invented new and useful Improvementsin Sand-Blast Machines, of which the following is a specification.

This invention relates to a sand blast machine, the general object of the invention being to provide means for controlling the 'valvesof' the machine by means of the weight of the sand therein so that after a certain amount of sand has entered the machine the large sand valve will be closed and the air valves and small sand valve will be opened, and then when the machine is almost empty, the operation will be reversed so that the machine will again be filled with sand.

Another object of the invention is to perinit the valve to be operated by hand whenever desired.

'TlllS inventlon also conslsts in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is an elevation of the invention.

Figure 2 is a view taken at right angles to Figure 1.

Figure 3 is a longitudinal sectional view.

Figure 4 is a section on line 4-4 of Figure 3.

Figure 5 is a detail view of the means for holding the valve operating rod in raised position.

Figure 6 is ,a horizontal sectional view showing such means.

In these views 1 indicates a support, 2, the tank which is pivoted to the support at 3 in such a manner that it tends to assume a tilted position on the support and 4 indicates the sand hopper which isarranged to deliver sand into the hopper 5 which is fastened to the top of the tank. 6 indicates the sand controll-ing-valve which controls the flow of sand from the hopper 5 into the tank. 7 indicates the valve for controlling the air blast into the tank and 8 indicates the exhaust valve for controlling the dis charge of sand from the tank. The valve 7 is a three-way valve so that in one position it will permit the air to exhaust from the tank and in another position will permit the air to flow into the tank and into the Valve 8 so as to facilitate the flow of sand through the discharge pipe 9. Each valve is provided with an actuating arm 10, the arm of the valve 6 being connected with a roller 11. to which is fastened a cable 12 which is also fastened to the valve 6, the cable upassing over a guiding pulley 13. The parts are so arranged that when the arm 10 is moved upwardly the cable will be shortened by being wrapped around the roller and thus the valve 6 will be raised to close the sand opening. By means of the arms 10 the valves can be actuated by hand and they are held in lowered position with the valves shut by means of the weights 14 which are connected with the arms by the flexible members 15. A vertically movable rod 16 carries the cross heads" 17 in which the pulleys 18 are journaled and theflexible members 15 pass over these pulleys so that by raising the rod 16 the valves are opened by the cross heads moving above the arms of the valves and causing the members 15 to raise the arms 10. When the rod 16 nears the end of its upward stroke, a roller 16 thereon'will engage a weighted arm 19 which is connected to the stem 20 of a valve 21 which controls the flow of sand from the hopper 4 into the hopper 5. Thus when the rod 16 is in its highest position the .valve 2lwill close the discharge opening of the hopper 4 and prevent further flow of sand into the hopper 5. The rod 16 is. held in its raised position by means of a latch 22 which is pivoted to a part 23 on the hopper 5, this part acting as a guide for the rod l6. The latch 22 engages a notch 24 in the rod, as soon as the notch comes opposite the latch, as a spring 24' moves the latch forwardly. When the tank 2 is in upright position, however, the latch is prevented from engaging the notch by reason of the fact that a bracket 25, secured to any suit able support, will engage a roller 26 on the latch 22 and thus forcethe latch away from the rod. A shaft 27 is journaled in the uprights 28 of the base and said shaft carries a pair of sprocket wheels 29 which are connected by the chains 30 with the projections 31 on the bottom of the tank so that the movementof the tank will be communicated to the shaft and vice versa. Weighted arms 32 are connected with the shaft 27 in such a manner that they will hold the parts with the tank in vertical. position as long as the tank is empty but as soon as the tankis filled the weight thereof with its contents will overcome the action of the weights on the arms so that the tank will assume a tilted position and as it moves downwardly it will rotate the. shaft 27 through means. of the chains andsprocket wheels. A pair of levers 33, are also connected with the shaft 27 so that they will, be moved when the shaft is rotated and each. lever carries a slotted arcshaped, part 34:. A rod 35 has blocks 36 at its ends which engage the slots in the parts) 34: and saidrod is connected by the coupling 37f with the lower end of the rod 16 so that the movement of the lever 33 will be communicated to the rod 16 when an end of each of the parts .34 strikes the blocks.

Fromfthe foregoing it will be seen that whenfthe tank 2 is empty the weighted arms 32will raise it to a vertical position and the rod 16 will be in such a position that the valve 6will be opened, the air valve 7 will begin exhaust position and the valve 8 in closed, position; Sand will thus flow from the hopper 5 which is being filled from the hopper 4, into the tank to fill the same. Under the weight of the sand the tank will tilt, thus raising the levers 33 and as soon as, the ends of the parts 34 engage the blocks 36'therod 16 will start to move upwardly. This upwardmovement of rod 16 will cause its upper crosshead to close the valve 6, then open the air valve 7 so as to admit air into 7 the tankand then the valve 8 will be opened so that sand will flow from the tank into the discl'iarge hose 9. The continued upward movement of therod 16 will close the valve 21 so as to cut off the supply of sand fro' nthe hopper 4 into the hopper 5 and the rod; will, be heldinits raised position by the l a tc l 22 engaging the notch 24. As the tank is; being emptied it will become lighter so that the weighted arms 32 will gradually move'the tank back to its vertical position andjust before it reaches its vertical position the roller 26 011 the latch 22 will strike the'bracket 25 so that the latch will be moved out of, engagement with the notch 24, per mitting the rod 16 to drop and thus open I the valve6 and close the valves 7 and 8.

The valve 21 will also be opened by means offthe weighted arm 19 so that the ,tankwill be again filled with sand. Thusthe act-ion ofjthe device isautomatic and the tank is kept, filled with sand.' The air blast valve andjthe discharge valve will close when the sand in the tank reaches a low level and sandw'illbepermitted to flow into the tank.

Then when the tank is filled the sand valve will be closed and the air and discharge valves opened. 7

It is thought from the foregoing description that the" advantages and novel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in. the construction and in the combination and'arrangement of the several parts, provided that such changes fall within the scope of the appended claims.

What I claim is 1. A- sand blast apparatus comprising a tank, having a: sand supply valve and an air-blast valve and movable part actuated by the weight of the sand in the tank and means actuated by said part for closing the sand supply .valve and opening the air blast valve when the weight of the sand reaches a certain degree and for opening the supply valve and closing the the air blast when the tank is almost empty. V

2. In a sand blast apparatus including a movable tank having sand and air controlling valves, a lever lifted by the down ward movement of the tank, a rod, means for reciprocating the rod by the movement of the lever and means carried by the rod for, actuating the sand supply valve and the air blast valve of the apparatus.

3.-In a sand blast apparatus including,-

a movable tank having sand andair controlling valves, a pivoted lever raised by the downward movement of the tank, a rod, a pin and slot connection between the rod and lever and means carried by the rod for controlling the valves of the apparatus when said ,rod is moved.

7 4:. In a'sand blast apparatus including a movable tank having sand; and air controlling valves, a pivoted lever raised by the downward movement, of the tank, a rod, a. pin and slot connection between the rod and.

lever,,1neans carried by the rod for controll ng the valves of the apparatus when-said rod" is moved, such means consisting of, an;

armconnectedwith each valve and a weight connectedwith therod and adaptedto move the arm when the rod reaches a certain position.

5. In a sand blast apparatus including a movable tank, its controlling valves, ahopper above the tank and a gate for'the-hopper, a pivoted lever actuated by the move of the apparatus and means for actuating:

the gateof the hopperby said rod. q 7 In testimony. whereof I afliK-my signature.

ESLEY 'JoRGENsEN. 

